QUANTITATIVE GENETICS OF RICE. IV. A BREEDING STRATEGY uri icon

abstract

  • A systematic and objective breeding strategy is proposed, involving three stages of selection carried out at the F-1, F-3 and F-6 generations of pedigrees founded on single crosses between inbred parents. The first two of these stages involve selection between pedigrees and the third, selection within the pedigrees that survive the first two stages of scrutiny. The key features of this procedure are: that selection within pedigrees is delayed until individuals are effectively homozygous; that all characters are measured directly; and that decisions are based on the performance of plants that are raised in replicated and randomised trials. The replacement of the pedigree method by the new method should allow breeders to recognise and exploit the genetical variation between and within their crosses for characters of interest more efficiently than hitherto at an appreciably lower cast. While this new method has been proposed in response to a specific problem with rice, it is applicable to all crop plant species where the end products of breeding programmes are inbred lines. (C) 1998 Elsevier Science B.V.

publication date

  • 1998
  • 1998
  • 1998